Federal officials have charged 28 non-citizens with illegally registering to vote in California.
Last week, the Justice Department sent state election officials a thumb drive it said contained the names of 20,000 people who were suspected of being non-citizens on the election rolls. However, state officials say federal officials did not offer proof to back up their claims.
For a closer look at this, KCBS' Margie Shafer spoke with KCBS Insider Phil Matier.
